Mazda MX-5 1990 Workshop Manual page 700

T
Table 2
Speaker Balance
Head restraint
speaker volume
Left door Left Min
Right door
Right Min
Left headrest
(Driver seat)
-
Max
Right headrest
(Driver seat)
-
Max
Left headrest
(Passenger - Max
seat)
Right headrest
(Passenger
-
Max
seat)
05UOTX-261
05UOTX-256
(L/Y) (RIG)
I I
AUDIO UNIT
I,I,M III
(L)
(R/W)
( R / W ) - n ( R / W ) - n
(R/G)-D (R/G)-Q
LEFT DOOR SPEAKER RIGHT DOOR SPEAKER
05UOTX-257
T-118
AUDIO
Speaker
Judgement
Next Step
operates
Yes Left door speaker circuit OK
-
No Left door speaker circuit faulty Step 5
Yes Right door speaker circuit OK
-
No Right door speaker circuit faulty Step 5
Yes
Left headrest speaker circuit (driver
-
seat) OK
Left headrest speaker circuit (driver
No
seat) faulty
Step 8
Yes
Right headrest speaker circuit (driver
-
seat) OK
No
Right headrest speaker circuit (driver
Step 8
seat) faulty
Yes
Left headrest speaker circuit (pas-
-
senger seat) OK
Left headrest speaker circuit (pas-
No
senger seat) faulty
Step 8
Yes
Right headrest speaker circuit (pas-
-
senger seat) OK
No
Right headrest speaker circuit (pas-
Step 8
senger seat) faulty
05UOTX-260
Step 5
1 . Remove the faulty door speaker cover and speaker instal-
lation screws.
2. Check if the speaker is properly connected.
3. If necessary, repair or reconnect the connector
4. If the connection is OK, go to Step 6.
Step 6
1. Disconnect the connector from the suspected faulty speaker.
2. Measure resistance between terminals of the speaker.
Resistance: 40
3. If not as specified, replace the speaker.
4. If the resistance is OK, go to Step 7.
Step 7
1. Disconnect the 12-pin connector of the audio unit.
2. Disconnect both door speakers.
3. Check for continuity of the following wires of the door speak-
ers wire harness.
Connectors Wire Continuity
Audio unit - Left door speaker
(R/W)
Yes
(RIG) Yes
Audio unit - Right door speaker
(L) Yes
(L/Y)
Yes
4. If not as specified, repair the faulty wiring.
5. If the wiring is OK, replace the audio unit.